Micro-orifice single-phase flow at very high Reynolds number

Cioncolini, Andrea; Cassineri, Stefano; Duff, Jonathan; Curioni, Michele; Scenini, Fabio

doi:10.1016/j.expthermflusci.2017.10.006

Cited by 19 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondly, water flows from a region of high pressure to a region of low pressure. By providing an outlet to the container [8], the velocity at the outlet increases, the pressure at the vicinity of the outlet decreases [9]. Thirdly, fluidity of water could flow through wide and tight spaces alike [10].…”

Section: Theorymentioning

confidence: 99%

Modelling of StormPav Green Pavement System Using Storm Water Management Model and SolidWorks Flow Simulation

Ching

Mah

Marlinda³

2019

IJRTE

View full text Add to dashboard Cite

Storm Water Management Model (SWMM) and SolidWorks Flow Simulation (SW-FS) models to represent StormPav Green Pavement System are tested through a case study of commercial premises. Modelling effort of simplifying the complex StormPav system to take in only the effective storage volume is attempted using the 1D SWMM. A 3D modelling of capturing the multi-compartmental and multi-unit StormPav system is attempted using SW-FS. The modelling outputs in terms of velocity distribution within the StormPav system of the two developed models are found to reasonably matched.

show abstract

Section: Theorymentioning

confidence: 99%

Modelling of StormPav Green Pavement System Using Storm Water Management Model and SolidWorks Flow Simulation

Ching

Mah

Marlinda³

2019

IJRTE

View full text Add to dashboard Cite

show abstract

“…The common microfluidic systems include micropumps, micromixers, microvalves, and lab-on-chip systems [6,7,8,9]. In these microfluidic systems, microchannels—especially micro-orifices—are often encountered and can be used to prevent instabilities and keep a uniform flow distribution or act as network connections, for example, in microchannel evaporators or in corrosion studies [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The released air bubbles behind micro-orifices were also experimentally studied and were found to be related to choking cavitating flow [30,31]. It should be noted that existing studies of cavitation inside micro-orifices were under a laminar flow state, while in microfluidic systems, such as micropumps and microvalves, the flow state is turbulent and the Reynolds number in the orifice can reach up to 25,000 [10,11,32]. Micro-orifices on a scale of tens to hundreds of microns may lead to a different conclusion compared with macroscale orifices.…”

Section: Introductionmentioning

confidence: 99%

Cavitating Flow through a Micro-Orifice

Jin

Gao

et al. 2019

Micromachines

View full text Add to dashboard Cite

Microfluidic systems have witnessed rapid development in recent years. As one of the most common structures, the micro-orifice is always included inside microfluidic systems. Hydrodynamic cavitation in the micro-orifice has been experimentally discovered and is harmful to microfluidic systems. This paper investigates cavitating flow through a micro-orifice. A rectangular micro-orifice with a l/d ratio varying from 0.25 to 4 was selected and the pressure difference between the inlet and outlet varied from 50 to 300 kPa. Results show that cavitation intensity increased with an increase in pressure difference. Decreasing exit pressure led to a decrease in cavitation number and cavitation could be prevented by increasing the exit pressure. In addition, the vapor cavity also increased with an increase in pressure difference and l/d ratio. Results also show the pressure ratio at cavitation inception was 1.8 when l/d was above 0.5 and the cavitation number almost remained constant when l/d was larger than 2. Moreover, there was an apparent difference in cavitation number depending on whether l/d was larger than 1.

show abstract

“…As water accelerates through the orifice, a pressure drop occurs due to the increase in kinetic energy and decrease in pressure energy of the system. As shown previously, [27][28][29] the dimensionless pressure drop K across micro-orifices is a function of the orifice Reynolds number Re as follows:…”

Section: Development and Validation Of Pressure Drop Measurements Acrmentioning

confidence: 99%

“…More details about the flow cell employed can be found in references. [27][28][29]37 CRUD deposition was analysed in terms of the change in diameter of the micro-orifice, as well as the pressure drop across the orifice caused by CRUD build-up.…”

Section: High-temperature Autoclavementioning

confidence: 99%

Development of a microfluidic setup to study the corrosion product deposition in accelerated flow regions

et al. 2017

Self Cite

View full text Add to dashboard Cite

CRUD (Chalk River Unidentified Deposit) forms in the water circuits of nuclear reactors due to corrosion of structural materials and the consequent release of species into the coolant. The deposition of CRUD is known to occur preferentially in regions of the primary circuit of pressurised water reactors (PWRs) where the water flow accelerates. In order to investigate this phenomenon, a micro-fluidic system, recreating plant conditions while using a simplified experimental set-up, was realised. A flow cell, comprising a stainless steel disc with a central micro-orifice, was used to create accelerated flow under representative operating conditions. By monitoring the pressure drop across the cell, the build-up rate (BUR) of CRUD within the micro-orifice was monitored in real time. By this setup, the conditions inducing deposition of CRUD under PWR conditions were emulated and CRUD deposition was induced in the accelerated flow region. Further effects associated with the presence of lithium hydroxide were investigated in real-time.

show abstract

Micro-orifice single-phase flow at very high Reynolds number

Cited by 19 publications

References 38 publications

Modelling of StormPav Green Pavement System Using Storm Water Management Model and SolidWorks Flow Simulation

Modelling of StormPav Green Pavement System Using Storm Water Management Model and SolidWorks Flow Simulation

Cavitating Flow through a Micro-Orifice

Development of a microfluidic setup to study the corrosion product deposition in accelerated flow regions

Contact Info

Product

Resources

About